1KFL

Crystal structure of phenylalanine-regulated 3-deoxy-D-arabino-heptulosonate-7-phosphate synthase (DAHP synthase) from E.coli complexed with Mn2+, PEP, and Phe


X-RAY DIFFRACTION

Starting Model(s)

Initial Refinement Model(s)
TypeSourceAccession CodeDetails
experimental modelPDB 1QR7PDB ENTRY 1QR7

Crystallization

Crystalization Experiments
IDMethodpHTemperatureDetails
1VAPOR DIFFUSION, HANGING DROP8.1295PEG 4000, lithium sulfate, manganese sulfate, phosphoenolpyruvate, phenylalanine, bis-tris-propane, pH 8.1, VAPOR DIFFUSION, HANGING DROP at 295K
Crystal Properties
Matthews coefficientSolvent content
2.8456.75

Crystal Data

Unit Cell
Length ( Å )Angle ( ˚ )
a = 290.097α = 90
b = 90.097β = 120.77
c = 155.798γ = 90
Symmetry
Space GroupC 1 2 1

Diffraction

Diffraction Experiment
ID #Crystal IDScattering TypeData Collection TemperatureDetectorDetector TypeDetailsCollection DateMonochromatorProtocol
11x-ray200CCDADSC QUANTUM 4mirrors2000-08-15MMAD
Radiation Source
ID #SourceTypeWavelength ListSynchrotron SiteBeamline
1SYNCHROTRONNSLS BEAMLINE X4A0.97165NSLSX4A

Data Collection

Overall
ID #Resolution (High)Resolution (Low)Percent Possible (Observed)R Merge I (Observed)Net I Over Average Sigma (I)RedundancyNumber Reflections (All)Number Reflections (Observed)Observed Criterion Sigma (F)Observed Criterion Sigma (I)B (Isotropic) From Wilson Plot
12.82099.30.076246.8845648454638.6
Highest Resolution Shell
ID #Resolution (High)Resolution (Low)Percent Possible (All)Percent Possible (Observed)R Merge I (Observed)Mean I Over Sigma (Observed)RedundancyNumber Unique Reflections (All)
2.82.998.70.3135.36.5

Refinement

Statistics
Diffraction IDStructure Solution MethodCross Validation methodStarting modelResolution (High)Resolution (Low)Number Reflections (All)Number Reflections (Observed)Number Reflections (R-Free)Percent Reflections (Observed)R-Factor (All)R-Factor (Observed)R-WorkR-FreeR-Free Selection DetailsMean Isotropic B
X-RAY DIFFRACTIONMADTHROUGHOUTPDB ENTRY 1QR72.820845468454525981000.2190.2190.2180.246random
Temperature Factor Modeling
Anisotropic B[1][1]Anisotropic B[1][2]Anisotropic B[1][3]Anisotropic B[2][2]Anisotropic B[2][3]Anisotropic B[3][3]
3.34-5.4-11.6578.317
Non-Hydrogen Atoms Used in Refinement
Non-Hydrogen AtomsNumber
Protein Atoms21411
Nucleic Acid Atoms
Solvent Atoms
Heterogen Atoms264

Software

Software
Software NamePurpose
MLPHAREphasing
DMmodel building
CNSrefinement
REFMACrefinement
DENZOdata reduction
SCALEPACKdata scaling
CCP4data scaling
DMphasing
CNSphasing